Friends of NASA (FoN) is an independent non-governmental organization (NGO) dedicated to building international support for peaceful space exploration, commerce, scientific discovery and STEM education.

Friday, September 01, 2017

Post-Tropical Cyclone Harvey | NASA/NOAA

Satellite Tracks Post-Tropical Cyclone Harvey Spreading into Ohio ValleySept. 1, 2017: Harvey is beginning to lose tropical characteristics as heavy rain spread toward the Ohio valley on Sept. 1. NOAA’s GOES East satellite provided a visible image of the clouds associated with the depression. Although Harvey has moved north and east, severe flooding continues across far eastern Texas and western Louisiana today, Sept. 1.

On Sept. 1, 2017 at 10:45 a.m. EDT (1445 UTC) NOAA’s GOES East satellite captured this visible image of the clouds associated with Post-Tropical Cyclone Harvey blanketing the Tennessee and Ohio Valleys and extending into the Mid-Atlantic region.

Flash flood watches and warnings are in effect from parts of Northern Mississippi across western Tennessee, Kentucky, southern Indiana and southwestern Ohio. Flood warnings remain in effect for parts of eastern Texas including the Houston metropolitan area and into western Louisiana.

NOAA’s Weather Prediction Center said Post-Tropical Cyclone Harvey is expected to produce an additional 1 to 3 inches of rain from western Kentucky into southeastern Indiana, southern Ohio and western West Virginia. Locally higher totals of 4 to 6 inches are possible around northern Kentucky. These rains will enhance the flash flooding risk across these areas. Meanwhile, widespread severe flooding will continue in and around Houston, Beaumont/Port Arthur/Orange, and eastward around the Louisiana border through the weekend.

On Sept. 1 at 11 a.m. EDT (1500 UTC) the center of Post-Tropical Cyclone Harvey was located near 36.4 degrees north latitude and 87.1 degrees west longitude. That puts the center about 30 miles (50 km) northwest of Nashville, Tennessee and about 111 miles (175 km) east-southeast of Paducah, Kentucky.

NOAA’s Weather Prediction Center noted that radar and satellite imagery show a loss of most tropical characteristics. Much of the moderate to heavy rains are organized to the north of the circulation center ahead of a warm front.

Harvey is moving northeastward toward the Ohio Valley and is expected to weaken Into Saturday, Sept. 2. An upper-level trough (elongated area of low pressure) arriving from the great lakes should begin to interact with the Harvey in Ohio on Sept. 2 and this is expected to support a secondary extratropical low over New England on Sept. 3. Minimum central pressure is 1002 millibars.

The NASA/NOAA GOES Project at NASA's Goddard Space Flight Center in Greenbelt, Maryland created an image. NOAA manages the GOES series of satellites and the NASA/NOAA GOES Project creates images and animations from the data.